Revolving chair



- C. A. BROWN REVOLVING CHAIR Filed April-5, 1920l I 6 Y 5"/ Ef 29 28 l5 P18 17 s. 11 -1 4% JJ 1 1li* Patented Feb. 19, 1924.

man STATES' cHAnLns A.. renown, or'L GARDNER, MASSACHUSETTS, Assrenon, BY MEsNEAssI'qn MENTsmo HEYWoon-WAKEFIntnooivrrnnv, on BOSTON, Messnenusntifmseori:

PoRA'TIoN or MASSACHUSETTS.

nnvonvme cfnAInl Appneatmn mea` pm 5,' 192.0.l serialfno. 311,359.

Tp all whom t may concer/n.'

Beit known that I,`CHARLES A'. Bnown, a citizen ofthe United "States, residing' at Gardner', in 'the county of" Worcester fand Commonwealth 'of lllassachusetts,v have ini l ven'ted'a new'and-us'efu'l Improvement ina Revolving Chair',y yof 'which' theV- (followinggto'e gfftlierwith the" accompanying drawings, is .7' r r r. I Anz.: ,f .ii-.lv y My'ifnvention relates to revolvingchairs thatarle" capable of jbeing yadjusted verti= cally 'and it has forits object tojprovidee'er= tain improvements in Ithehub' structure' and the 'riieansffor adjusting the height of the Revolving chairs,` as heretofore constructed," 'have usually comprised a base: provided with a 'hubcastin'g for receiving a threaded spindle carried by 'thef 'se'at Yand h'ave'femf` ployedfa nut coactingwithv the'i'spindle for' vertically adjusting?fthe1 v"chair-:f1 'Various' meanshave also? been provided'for locking thenut against turning'on the spindle, so as toprevent 'vertical movement 4of the chair seat' after ithas o nce beenadjusted, without interfering with thev rotation thereof.' vThe users 'of V"such revolvingvchairs"have heretoforev been 11 s'ubj ected to considerable. annoyance whenadjusting thesameyowing to the fact" thattlie locking' member' usuallyrej ceives some oi the lubricantused onfmth'e spindlefand consequently is covered'with dust "and dirt. i By my'in'vention, I propose to improve the above described' generaliconstruetion by eliminating 'the' 'relatively heavy and expe'nl` sive cast iron hub and substituting therefor a hub made up entirely of pressed -finetal parts which' may bemanuf'actured'y inquan-Y tityk at small cost and *are readily' assembled 'ri the chair'. fui-therr propose vto 'incluse the 'working parts 'o'-` the? -"spindlef'fan'd "the nut ia'dus 'proof cover, which; nt'ofily seryesfto keep thef'dus't-"andl'd-ifrt*from y'the werking parte, but, also 'prevent'sftne flubri; eafipffmfgttingfonffhellhadsfbf the' user whenadjustingtheehair,v In the accompanying-drawings,

Ei'g.f1*isa side view of a' chainconstructed in Leeordance with myfinvention; f '1 Fig. EZ'is.l a planview along the line'2-2g toshowthe ldetails"`ofV the 'hub'.l- "f Fig.v '3 `1s a transverse sectional Iview along the line 3-3, Fig. 2. 'f

55 FFigl'isfan enlarged sectional view along p fr'Fig'. 5 fis'a plan view looking at the .ff'Referingrst to' lvFigi@ 11," the chair prises-aseat 1 which supports a back 2=and com;

base 'offithe chair, ywhich v"is I'supported rupon 1Q inelosed' by the ends of fthe dovetail porti'on"s'-8. A rectangular casing-:119isdisposed inthe opening'lOf'and a ycylindrical bushing 12V fits closelywithinthe casing 1I.' The cas ing. 11l and :thebushing'rlQf;are preferably pressed -fromcshe'et yfnetal, the joined ""edge's oi these""membersfbeing` 'spot weldedI to= Y, ff, v .Y F..

The several portions of the'hub are held together 4'between 'the-Soaps; :13 and 14, l by bolts 15 passingtthrough;fthe 'dovetail por= tions Sof the legs 7; Asbest shown lin Fig.

2,'-tl1'e upper hub: cap 13:y isfsubstantially "circular in .form andffis?provideddaround rits outer periphery.'k r'with f a .fplurality of f' spaced bents'ovei" an'ges 'lfextending between-the lg's? and holding? the filler' bloeks 9.1m po; l p

sitionfThe 'cap 113 isf providedarwith fa" dje= pressed portionV` 17 ,f whichfextends into ain annular xseatf r'1i-'8. `formed/'at theftop of? the hub.' .7-"llhi'` depressedriortin'fl'lf isvprovided with' ai" central i open11fg"191 which flbreceives the upperfendfo tlfebushing',112,` which exi tends Sbeyo'ndi theffcasing'fllv and projects above thefihttomf'surface of-{the depressed in position, in the same manner as the anges 16. The cap 14 is further provided with projecting wing portions 23 between the flange portions 22,' whichare bent down-v wardly to conform to the curvature of the legs'7.` The legs are secured tothe wings 23 by screwsV 24. Thev cap 14 is provided ,with a central opening 25 which receives. the Vlower end of-the bushing 12 which projects 'f beyond the casing 11.

' The spindlei6 is'supported in the bushing 12 by an` internally threaded nut`26, the

. llower portion 4of vwhich is Vreceived in the recessed portion 17 of the upper hub cap Y13,

and is provided with a groove 27 for rez ceiving the upper end ofthe bushing .12;

The projecting end' ofthe bushing 12v forms a cup in the recessedportion 17 for the re- Qtention of a sulicient amount of heavy grease to lubricate the bearing 'surfaces of theV nut. VThe nut 26 isV further Yprovided with a peripheral groove 28 which receives the end of the 'stud 21, and` thereby secures theV nut 26 to the hubV cap` 13 lWithout inter-V tering with 'itsV rotation. l Y

1A bell-shaped cover 29 isprovided with a central opening for the reception of the spindle 6 and is secured totheV top of the nut 26 in any suitablernanner,such as by vspot welding. As best shown in Figs. 2 and 4, thecover29 is provided with Va slotV 30V which extends from the spindle 6 radially across the cover and terminatesin a circu- V lar opening 31 near the periphery ofthe cover.V The nut 26 yis provided witha slot 32 which registers with the slot 30 in the cover, and a latch lever 33, pivotally 1nounted on a pin 34, is adapted to move -in the slots 30 and 32. The latch lever 33 is profV videdat one yend with a locking portion35 that is 'adapted'to'bereceived in a longi-V tudinal Vslot provided on the vspindle 6'V (when the lever is ina substantially lhorizontal position, asshown in' Fig. 4.VV `The other end ofthe lever 33 is provided with a cap 37 Vthat covers the opening 31 in the vccverf29.y The form of the `latchlever 33 is such that Yitsupper surface is justfiush with Vwhen'the'leverV 33 is moved tothe position, shown jin dottedlines,VY thelocking portion 35 is then `entarely disposed in the'slot in the top ofthe cover 29 when in itsV hor1- zontal position. i Whenthe Vlockingportion 3of'the lever 33 iS Vlocatedjin the s101136 ofl the vSpindle 6, relative rotationbetween theV nut andV thel spindle is prevented',V but the nut 26 and the spindle 6 be turned 65 to adjust the vertical positionoi the seat 1. `From the foregoing, it is apparent that l have provided. an extremely vrigid hubV construction for the base of the chair, as'all parts comprising the saine are securedtogether between thefhubcaps 13 and 111. The bushing forV the spindle,l together with its inclosing casing,- andfthe'fhub caps are. vall-readily pressed Jrrcni sheet metal, thereby reducingv the weightand cost or manu'- l:tact-ure `of thechair, as compared with those in which a solid castiron hub employed.

inclose's the working' .portions-of the hub, which are-covered with lubricant and eiiec;

,- The cover attachedl to the'nut'cornpletely'80 Y tively serves toy heepthe bearing surfaces Jree from dust Vand dirt. Vlrlhe :latch lever conforms to the surface yor the cover-"when in .its n ormalpositionfand presents no projecting portions which 'might catch on. the

clothing Yofthe user of the chair and alsof-:f Y

serves toV close-"thei-slot within; which; it Y moves. When it isfrdesired to adjustY the vertical positionof the seat 11,- itis'only necessary-to liftthe latch lever by means of the cap 37 and this may be done without any possibility of soiling the lingers with` the'V lubricant contained `in the depressed portion' 17. `Afterthe chair has,beenf'a'd- Vjusted to the 'desired' position, it may 'be locked by turning the spindle until the slot 36 again registers with the locking'portion 35 of the latch lever. incase it is desired to remove the spindle trein the hub, it is only necessary toturny the cap V29until the Vopen- 'ing 31 registers with the headfofthestud iA 21, so Vthat a suitable tool may be Ainserted through the opening; 31 in order to' unscrew Y the end of the stud Afrom the groovei28 in the nut.V The spindle Gtogether .withV the nut and cover 'may lifting the yseat l. I

While 1 have shown-myinvention infits simplest and preferred forint,andas-ap-` plied to a particularconstruction of a of they appended claims.

*l claimt, Y f Y, l1.V ln aA revolving chaiigjaV pluralityqof then be withdrawn f 'chain it is'not so'liinited but-issusceptible g of various modifications `within the scopeV legs converging to kforin ahub, a hubcap -ff having an `annular depressionextending into 1a recessin said hub, a threaded spindle attached tothe vchair seat and carrying a nut seated inthedepression of the hub cap,

Vand afbushing extendingthrough thehub v izo into the cap .and projectingrahove thelower i surface of the depression for the retention of lubricant therein; f

2. Inv a revolving chair, a threaded spinl dle attached to the chair seat, anntcarried Vby the spindle and rotatably supported the hub of the chair, a locking member pivotally mounted on said nut for preventing relative rotation between the nut and the spindle, a stud carried by the hub to secure the nut thereto, and a cover inelosing both the locking member and the stud, the said cover being provided with an opening to permit movement of said locking member therein and to give access to Said. stud. Dated this 26th day of March, 1920.

CHARLES A. BROWN. Witnesses:

B. M. COBURN, E. H. BLACK. 

